All the good aluminum cutters have a lot bigger cutter edges on them and are further a lot further apart than the one shown in that picture. Those type are for steel, iron and other harder metals than aluminum As far as keeping the aluminum from sticking to the bits using candle wax or parafin to coat them frequently helps a lot I roll the bit in it by hand before starting and again as needed
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)